:root{ --primary:#C81414;}
body{margin:0;font-family:sans-serif;background:#f8fafc;color:#0f172a}
.hidden{display:none}
header{background:#fff;border-bottom:1px solid #ccc;display:flex;align-items:center;justify-content:space-between;padding:10px}
.brand{font-weight:800;}
.brand span{color:var(--primary)}
nav button{margin-left:8px;padding:6px 10px;border:1px solid #ccc;border-radius:8px;background:#fff;cursor:pointer}
nav button.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.login-card{max-width:320px;margin:20vh auto;background:#fff;border:1px solid #ddd;border-radius:12px;padding:20px;text-align:center}
.login-card input{width:100%;padding:8px;margin:8px 0;border:1px solid #ccc;border-radius:8px}
.login-card button{width:100%;padding:10px;border-radius:8px;border:0;background:var(--primary);color:#fff;font-weight:600;cursor:pointer}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.card{background:#fff;border:1px solid #ddd;border-radius:8px;padding:10px}